<template>
  <div class="login_container">
    <el-row>
      <!--:xs屏幕宽度小于等于768的时候,表单全占,占位消失  -->
      <el-col :span="12" :xs="0"></el-col>
      <el-col :span="12" :xs="24">
        <el-form
          class="login_form"
          :model="loginForm"
          :rules="rules"
          ref="loginForms"
        >
          <h1>Hello</h1>
          <h2>欢迎来到硅谷甄选</h2>
          <el-form-item prop="username">
            <el-input
              :prefix-icon="User"
              type="text"
              v-model="loginForm.username"
              placeholder="请输入用户名"
            ></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input
              :prefix-icon="Lock"
              type="password"
              v-model="loginForm.password"
              placeholder="请输入用密码"
              show-password
            ></el-input>
          </el-form-item>
          <el-form-item>
            <el-button
              :loading="loading"
              class="login_btn"
              type="primary"
              size="default"
              @click="login"
            >
              登录
            </el-button>
          </el-form-item>
        </el-form>
      </el-col>
    </el-row>
  </div>
</template>

<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue'
// reactive: vue 代理对象
import { reactive, ref } from 'vue'
import { useRouter, useRoute } from 'vue-router'
import { ElNotification } from 'element-plus'
import useUserStore from '@/store/modules/user'
import { getTime } from '@/utils/time'
let userStore = useUserStore()
// 获取el-form组件
let loginForms = ref()
// 获取路由器
let $router = useRouter()
// 获取路由对象
let $route = useRoute()
// 定义变量控制按钮加载效果
let loading = ref(false)
// 收集表单的数据
let loginForm = reactive({ username: 'admin', password: '111111' })
// 定义校验规则函数
const checkUserName = (rule: any, value: any, callback: any) => {
  // rule:即为校验规则对象
  // value:即为表单元素文本内容
  // 函数：如果符合条件放行callback
  // 如果不符合条件,注入错误提示信息
  if (value.length >= 5) {
    callback()
  } else {
    callback(new Error('账号长度至少五位'))
  }
}
const checkPassword = (rule: any, value: any, callback: any) => {
  if (value.length >= 6) {
    callback()
  } else {
    callback(new Error('密码长度至少六位'))
  }
}
// 定义校验规则
const rules = {
  username: [
    // { required: true, message: '用户名不能为空', trigger: 'blur' },
    { validator: checkUserName, trigger: 'change' },
  ],
  password: [
    // { required: true, message: '密码不能为空', trigger: 'change' },
    { validator: checkPassword, trigger: 'change' },
  ],
}
// 登录按钮回调
const login = async () => {
  // console.log('loginForms.value.validate--->', loginForms.value.validate())
  // 保证全部表单项都校验通过才发请求
  await loginForms.value.validate()
  // 加载效果，开始加载
  loading.value = true
  try {
    // 保证登录成功
    await userStore.userLogin(loginForm)
    // 编程式导航跳转到展示数据首页
    // 判断登录的时候,路由路径中是否有query参数,有 跳query 无 跳首页
    let redirect: any = $route.query.redirect
    $router.push({ path: redirect || '/' })
    // 登录成功的提示信息
    ElNotification({
      type: 'success',
      message: '登录成功',
      title: `Hi,${getTime()}好`,
    })
    // 登录成功，加载效果也消失
    loading.value = false
  } catch (error: any) {
    loading.value = false
    // 登录失败的提示信息
    ElNotification({
      type: 'error',
      message: error.message,
    })
  }
  // 1.通知仓库发登录请求
  // 2.请求成功->首页展示数据的地方
  // 3.请求失败->弹出登录失败信息
}
</script>

<style scoped lang="scss">
.login_container {
  width: 100%;
  height: 100vh;
  background: url('@/assets/images/background.jpg') no-repeat;
  background-size: cover;
}
.login_form {
  position: relative;
  width: 80%;
  top: 30vh;
  background: url('@/assets/images/login_form.png') no-repeat;
  background-size: cover;
  padding: 40px;
  h1 {
    color: white;
    font-size: 40px;
  }
  h2 {
    color: white;
    font-size: 20px;
    margin: 20px 0px;
  }
  .login_btn {
    width: 100%;
  }
}
</style>
